DEXG Pool Trade Out

The use case is a "Trade Out" swap in a single transaction:
We have 1 ETH, and 
Want to wrap this 1 ETH to 1 WETH, and
Swap 1 WETH for an amount of tokens from the pool poolAddress, and then
Sell the the amount of tokens in Uniswap V2
    interface IUniswapV2Router {
        function swapExactTokensForETH(
            uint amountIn, 
            uint amountOutMin, 
            address[] calldata path, 
            address to, 
            uint deadline
        )
            external
            returns (uint[] memory amounts);
    }
​
    interface IDextokenPool {
        function swapExactETHForTokens(
            uint amountIn,
            uint minAmountOut,
            uint maxPrice,
            uint deadline
        ) external returns (uint);
    }
​
    function tradeOut(
        address[] memory path,
        address poolAddredss,
        uint deadline
    ) 
        public 
        payable
    {
        uint amount = msg.value;
​
        IWETH(WETH).deposit.value(amount)();
        
        if (IERC20(WETH).allowance(address(this), pool) < amount) {
            IERC20(WETH).safeApprove(pool, MAX);
        }
​
        /// DEXG Swap: WETH to Token
        IDextokenPool(pool).swapExactETHForTokens(
            amount,
            0,
            MAX,
            deadline
        );
        
        /// Uniswap: [Token, ..., WETH]
        address token = path[0];
        uint tokenAmount = IERC20(token).balanceOf(address(this));
​
        if (IERC20(token).allowance(address(this), uniV2Router) < tokenAmount) {
            IERC20(token).safeApprove(uniV2Router, MAX);
        }
        
        IUniswapV2Router(uniV2Router).swapExactTokensForETH(
            tokenAmount, 
            0, 
            path, 
            address(this), 
            deadline
        );
        
        msg.sender.transfer(address(this).balance);
    }
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Last modified 1yr ago